Cook the gluten free pasta according to package directions until al dente. Drain and set aside.
In a skillet, warm the olive oil over medium heat. Add the onion and sauté until soft.
Add the garlic and cook for about 1 minute, just until fragrant.
Place the beans, broth, nutritional yeast, salt, pepper, and lemon juice in a blender. Blend until smooth.
Pour the sauce into the skillet with the onions and garlic. Stir gently and heat through.
Add the cooked pasta to the skillet. Toss until the noodles are coated in the sauce.
Top with fresh parsley and serve warm.