Mr. Food: Spicy Tomato Mac 'n' Cheese

• 1/2 pound penne pasta
• 1/4 cup (1/2 stick) butter
• 1/2 medium-sized sweet onion, chopped
• 1 (8-ounce) loaf Mexican-style pasteurized prepared cheese product, cubed (see Options)
• 1 cup sour cream 1 (14-1/2-ounce) can diced tomatoes with green chilies, drained (see Options)

1. Cook pasta according to package directions; drain well.
2. Meanwhile, in a large skillet, melt butter over medium heat; add onion, and sauté 3 minutes, or until tender. Add cheese, and cook, stirring constantly, for 5 minutes, or until the cheese melts. Stir in sour cream, blending well.
3. Stir in tomatoes and pasta; cook, stirring constantly, for 5 minutes, or until thoroughly heated.

OPTIONS: To tame the spiciness, switch to regular prepared cheese product and mild diced tomatoes with green chilies. You'll get all the flavor with just a slight kick.