Ground Beef and Baked Bean Casserole

Ground Beef Casserole

2 T Olive Oil
2 lg. onions, chopped
1 lb. ground beef
2 -  15oz. can baked beans
2 medium tomatoes, chopped finely (about 1 cup)
1/4 cup packed light brown sugar
1 T Dijon mustard
1-1/4 t. salt
1/2 t. black pepper
5 slices bacon

Preheat oven to 350 degrees.   Coat a 2 qt. casserole with Pam.    In large skillet, heat oil over medium heat.   Add onions and cook for 5 minutes.   Add ground beef.  Cook 10 minutes or until brown.   In large bowl, combine beef mixture with remaining ingredients except bacon.   Mix well.   Pour into casserole dish and put bacon on top.   Cover with foil and cook for 45 minuteres.  Broil 1-2 minutes to crisp bacon on top.