Spectacular Meatloaf

This was so good even my husband (long-time meatloaf-hater) liked it!

Ingredients - these are all estimates, as I really didn't measure anything.
6 Tbsp butter
1/4 c sliced onion
2 cloves garlic, chopped
1/4 c green bell pepper, diced
1.5# ground beef (or other ground meat)
4 oz block cheese (I used colby jack)
1 egg
1/4 c bread crumbs
1-2 Tbsp milk (optional)
salt
pepper

1. Preheat oven to 350.
2. Melt butter over medium heat; add onions, garlic, and bell pepper. Saute or boil until soft then remove from heat to cool. You may want to put it in the freezer for a couple minutes to cool the butter a bit.
3. Mix together meat, cheese, egg, and bread crumbs. Add butter mixture, including excess butter, and mix. If the butter is still too hot, add milk to cool it off.
4. Form into a loaf and place in pan. I recommend using a pan that will allow the fat to drain away from the loaf, as the butter and cheese create more fat than the usual meatloaf.
5. Bake for 1 hr 20 min or until it has reached a safe temperature.