Orange Roughy with Tomatoes

2 large onions, sliced
1 medium bell pepper, sliced
1 clove garlic, minced
1 can (1 lb) no-salt-added stewed tomatoes, crushed
1 tsp oregano
1 1b orange roughy, cut into 4 serving-size pieces
1 lemon, sliced
Freshly ground black pepper to taste

Sauté onions and bell pepper until tender. Stir in garlic, tomatoes, and oregano, cooking for 1 minute. Place fish in a single layer in a nonstick baking dish.

Top with lemon slices and pepper; add vegetable mixture. Bake, uncovered, at 350° for 45 minutes. Fish is done when it is opaque and flakes easily with a fork.