Creamy twist: Add a splash of heavy cream to the onions before tossing with pasta.
Veggie boost: Stir in sautéed mushrooms or spinach for added heartiness.
Protein option: Top with grilled chicken, sautéed sausage, or shrimp.
Vegan version: Use olive oil instead of butter and swap Parmesan for nutritional yeast.
This Slow Cooker Caramelized Onions Pasta is simple, elegant, and full of deep, savory-sweet flavor—the kind of comfort food you’ll crave again and again.
