Maple and Garlic Marinated Pork Tenderloin

Ingredients (9)

• + 1 small onion, chopped add to pantry
• + 1 cup maple syrup add to pantry
• ✓ 2 tablespoons Dijon mustard
• ✓ 6 cloves garlic, minced
• + 1 teaspoon horseradish add to pantry
• + 1 teaspoon sesame oil add to pantry
• + freshly ground black pepper to taste add to pantry
• + 1 ½ pounds pork tenderloin add to pantry
• + 1 teaspoon olive oil, or as needed add to pantry