A High-Protein, Vegetarian Alfredo Pasta You’ll Crave Again and Again
There are some flavor combinations that just work—and caramelized onions with mushrooms is one of them.
When slow-roasted until golden and sweet, onions become silky, savory, and almost jam-like. Pair them with earthy mushrooms and mellow, roasted garlic, and you’ve got the foundation for a pasta dish that tastes indulgent, cozy, and restaurant-worthy… without being heavy.
This Creamy Caramelized Onion & Mushroom Pasta with Chickpeas is proof that comfort food doesn’t have to come with a side of regret. Instead of relying on heavy cream and butter, I created a lighter, protein-packed Alfredo-style sauce using low-fat cottage cheese, Parmesan, and pasta water—giving you all the creaminess with a fraction of the fat.
And yes… it’s just as good as it sounds. Plus, it’s perfect for busy weeknights, post-workout dinners, or anytime you want something cozy and nourishing. And, prepared as directed, it has only 335 cal per serving with 20g vegetarian protein.
The Secret: Oven-Caramelized Onions + Roasted Garlic
Traditional caramelized onions are delicious—but let’s be honest: standing over a stove for 45 minutes, stirring constantly, isn’t always realistic. That’s why I love oven-roasting them instead. By roasting sliced onions alongside mushrooms, chickpeas, and a whole head of garlic, everything slowly transforms in the oven:
- The onions become sweet, tender, and deeply flavorful
- The mushrooms turn rich and savory
- The chickpeas get lightly crisped and hearty
- The garlic becomes soft, buttery, and mellow
Later, that roasted garlic gets blended right into the sauce, adding incredible depth without overpowering the dish. It takes a little longer than stovetop caramelizing—but it’s mostly hands-off. Let the oven do the work while you live your life.
A Lighter, Protein-Packed Alfredo (Without Heavy Cream)
Traditional Alfredo sauce is delicious… and also loaded with heavy cream, butter, and tons of fat.
So I decided to flip the script. Instead, this creamy sauce is made with:
- Low-fat cottage cheese
- Parmesan cheese
- Reserved pasta water
- Roasted garlic
When blended together, it becomes smooth, rich, and velvety—just like Alfredo—while delivering extra protein and far less fat. You still get that luxurious, cling-to-your-noodles texture… without feeling weighed down afterward.
I also used a lower-carb pasta (spagetti noodles) from Carbe Diem — just to bring a little more balance to this pasta dish. Of course, you can use any type and shape of pasta that you need including gluten-free or veggie noodles.
Creamy caramelized onion and mushroom pasta with chickpeas made with a lighter, high-protein cottage cheese Alfredo sauce. This vegetarian comfort food delivers big flavor with just 360 calories and 20g protein per serving.
- 2 lbs. white or yellow onions preferably a “sweet onion” like Vidalia or Texas 1015, sliced thinly
- 1 head garlic cut in cross section (still in husk)
- 3 tbsp olive oil divided
- 2 tbsp coconut sugar or brown sugar
- 8 oz white button or Cremini mushrooms sliced
- 1 15 oz can chickpeas drained
- ½ tsp salt
- ½ tsp ground pepper
- 12- oz dry weight low-carb pasta (I used Carbe Deim), cooked per manufacturer’s instructions*
- 1 cup 2% cottage cheese
- 1 cup pasta water *don’t drain the pasta before pulling this out!!!
- ½ cup grated Parmesan cheese
- 2 tbsp Worcestershire sauce
- Garnish – chopped parsley
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Preheat oven to 375F.
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In large cast iron skilled (or 9”x13” baking dish), add sliced onions. Drizzle with 2 tbsp of the olive oil and sprinkle with coconut sugar. Add halved garlic head (still in husk). Cover pan/dish with foil.
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Roast in oven, with pan covered in foil, for 45 minutes, stirring up once or twice and returning foil to cover.
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Remove from oven and add sliced mushrooms, drained chickpeas, salt and pepper, and remaining 1 tbsp of olive oil.
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Return to oven, UNCOVERED, and turn heat up to 400F. Cook for another 30-45 minutes until onions caramelized to a nice deep golden color and mushrooms softened.
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Meanwhile, while onions and mushrooms are cooking in this step, prepare low-carb pasta per box instructions – AND, it is important to reserve 1 cup of the pasta water before draining to use in the sauce.
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To make the sauce, add cottage cheese, ¾ cup of pasta water, 2 tbs Worcestershire sauce the Parm cheese to blender and process until smooth. If it seems too thick, add more pasta water a tablespoon at a time.
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Remove onion mixture from oven and pop roasted garlic out of pods – lightly smash garlic cloves in pan with back of fork. Pour cottage cheese sauce over onion mushroom mixture and add noodles. Stir well to coat and garnish with chopped parsley.
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Store leftovers for up to 3 days, covered in fridge.
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Makes 6 huge servings: 335 cal, 63g carb, 10g fat and 20g protein per serving
