Meat Loaf Sauce

Step 1

Melt butter in a large skillet over medium-high heat; add onion and bell pepper, and sauté 5 minutes or until vegetables are tender. Stir in ketchup and vinegar, and simmer, stirring constantly, until sauce thickens.

Step 2

For a spicier sauce, substitute 3/4 cup chili sauce for ketchup.