Marinated Venison Loin Steaks with Onions and Sweet Peppers

Name: Marinated Venison Loin Steaks with Onions and Sweet Peppers
Ingredients: 1/2 cup molasses; 1/2 cup balsamic vinegar; 1/2 cup Roasted Garlic Cloves, recipe follows; 1 branch fresh rosemary; 1/2 small Thai chile, thinly sliced or 1 teaspoon red pepper flakes; 1 teaspoon freshly cracked pepper; 6 (1-pound) venison loin steaks, bone in; 6 bell peppers, red and yellow; Salt and freshly ground black pepper; 3 tablespoons grapeseed oil; 1 large Vidalia or other sweet onion, cut into 1/4-inch-thick slices; Unpeeled garlic cloves, as needed