Preheat oven to 350

If caramelizing the onion, heat a tablespoon of olive oil in a small skillet. Add the onion and cook over high heat for about 5 minutes until some of the onions get dark. Reduce the heat to very low and cook another 15 - 20 minutes until the onions are golden brown and very sweet.

Mix all the ingredients in a large mixing bowl.

Spread evenly in a 10 x 15" baking sheet or pan (If using a larger pan or a lesser amount of ground meat, spread into a large patty about 1/2" thick).

Bake for 20 minutes or until cooked through.

Pour off any juices/fat and cut into 12 - 16 portions.

Serve on dinner rolls for sliders or as a breakfast patty with a fried egg as shown.