4 sweet potato and gruyeere Recipes

all-purpose flour, fat-free milk, chopped onion, chopped fresh sage, chopped shallots, sea salt, bay leaf, olive oil, divided, chopped onion, garlic cloves, minced, sea salt, divided, fresh spinach, chopped portobello mushroom caps (about 1 1/2 lb), cubed peeled sweet potato (about 2 1/2 lb), shredded gruyere cheese, grated fresh parmesan cheese, precooked lasagna noodles, warm water

freshly grated parmesan, chopped onion, garlic clove, minced, unsalted butter, all-purpose flour, milk, coarsely grated gruyere (about 3 oz), mashed cooked sweet potatoes (about 1 1/2 lb), eggs, separated

yukon gold potatoes (about 4 lb), salt, divided, butter or margarine, sweet onion, chopped, pepper, shredded gruyere cheese, cream sauce