1. Prepare onions according to package directions. Drain, reserving 1/4 cup liquid. In a large bowl, combine the onions, peas, soup, 2 tablespoons pimientos and reserved cooking liquid; stir to coat. Transfer to a greased 1-1/2-qt. baking dish.
2. Bake, uncovered, at 350° for 35 minutes. Sprinkle with cheese and remaining pimientos. Bake 5 minutes longer or until the cheese is melted. Yield: 4-6 servings.