Cheeseburger ring, Split pea soup, Parmesan chicken

Winter is good for food that “sticks to your ribs,” as my grandmother used to say.
Cheeseburger ring
1 TBS vegetable oil
1 onion, chopped
1 lb. ground beef
kosher salt
freshly ground black pepper
1-2 TBS yellow mustard
1-2 TBS ketchup
2 (8-oz.) tubes crescent rolls
6 slices cheddar cheese, halved
1/3 C dil...