Preheat oven to 400 degrees F.
Place olive oil in large oven-proof skillet over medium-high heat.
Add onions and cook until soft, about 5 minutes.
Add sausage and cook until no longer pink, about 8 minutes.
Add beans, stirring to combine.
Season with salt or garlic salt.
Add kale, and stir, cooking until wilted. I put a lid on mine for ~1 minute to "steam" it.
Top with bread crumbs and shredded cheese.
Place in oven and bake until cheese is melted, about 3-4 minutes.
Serve and enjoy!