1 1/2 cups sweet potatoes, scrubbed
1 tablespoon olive oil or canola oil
1/4 teaspoon kosher salt, or to taste
2 teaspoons Fresh rosemary, chopped (or 2 tsp. dried)
4 (6oz) tilapia fillets
1/2 teaspoon Black pepper, freshly ground
1 1/2 cups whole-wheat bread crumbs
1 tablespoon Finely chopped parsley
1 teaspoon lemon zest
1/4 teaspoon cayenne pepper
3 egg whites
1/4 cup dark beer, such as stout or porter
4 Lemon wedges, for garnish