Green Pepper and Spinach

1 medium onion, chopped
1 medium green bell pepper, chopped
1 tablespoon vegetable oil
1 medium tomato, chopped
1 pound fresh spinach
3/4 teaspoon salt
1/8 teaspoon pepper
1/4 cup peanut butter

Cook and stir onion and green pepper in oil in 3-quart saucepan until onion is tender. Add tomato and spinach. Cover and simmer until spinach is tender — about 5 minutes.

Stir in salt, pepper and peanut butter; heat just until hot.

Yields 4 servings.