Marinated Fresh Ham Steak

1 ham steak (not cured or smoked)
1/2 medium onion, minced finely
1/4 cup cooking oil 
1/4 cup soy sauce (or coconut aminos)
2 Tbsp brown sugar
2 tsp Worcestershire Sauce
1 tsp Dijon Mustard
2-4 garlic cloves, minced
Dash black pepper

Combine all ingredients and add to a gallon ziplock bag. Refrigerate overnight (4-12 hours), making sure to massage/turn the bag every so often.

Remove ham steaks from the bag and wipe off marinade. Allow the steak to come to room temperature before cooking. 

Cook on a hot grill or cast-iron skillet for 3-4 minutes per side.