Cook frozen peas according to package directions. Drain.
Meanwhile, cook bacon in a medium skillet until crisp. Drain, reserving drippings in skillet. Crumble bacon; set aside. Cook onion and garlic in drippings over medium heat about 3 minutes or until tender. Stir in mustard, lemon-pepper seasoning or pepper, and salt. Cook about 30 seconds more. Toss onion mixture with peas. Sprinkle bacon atop peas. Makes 8 servings.