Garlic-Thyme Burgers with Grilled Tomato

Ingredients

• 2 inch beefsteak tomatoes 
• 0.3 teaspoon pepper black freshly ground
• 1 tablespoon dijon mustard 
• 1 tablespoon thyme leaves fresh chopped
• 2  garlic cloves minced
• 1 pound ground sirloin 
• 0.4 teaspoon kosher salt 
• 4  baby romaine lettuce leaves 
• 8 ounce kaiser rolls 

Equipment

• bowl
• frying pan
• grill pan

Directions

1. Heat a grill pan over medium-high heat.
2. Combine first 5 ingredients in a medium bowl. Divide mixture into 4 equal portions, shaping each into a 1/2-inch-thick patty.
3. Add patties to pan; cook 4 minutes on each side or until desired degree of doneness.
4. Remove patties from pan.
5. Add tomato slices to pan; cook 1 minute on each side.
6. Spread about 3/4 teaspoon mustard over bottom half of each roll; top each with 1 lettuce leaf, 1 patty, 1 tomato slice, and top half of roll.