Caprese Grilled Cheese Sandwich

*Adapted from here.

Serves: 2 (but easily multiplied)
Prep: 15 minutes

INGREDIENTS
4 slices bread
2 Tbsp olive oil
4 Tbsp basil pesto (I used prepackaged.)
1 ball fresh mozzarella, room temperature, sliced 1/4" thick, set on a paper towel to remove excess liquid
1 large ripe tomato, room temperature, sliced 1/4" thick

DIRECTIONS
1. Heat a nonstick pan (or panini press or George Foreman grill) over medium heat.
2. Brush the outside of each slice of bread with oil and spread the pesto on the inside. Place the mozzarella on the pesto on one slice of bread, top it with the tomato slices, and finally top with the other slice of bread pesto side in.
3. Place the sandwich on the pan and cook until golden brown and cheese has melted, about 2-4 minutes per side. (Or, place in press or grill and cook for 3-5 minutes.)