Brush both sides of your bread with olive oil then toast in a toaster over or right on the grill. When golden, rub the garlic clove over the bread. Set aside.
Heat a large frying pan over medium high heat or use the grill. Brush the burgers with the remaining oil and grill for 5 minutes, turning once.
Top 4 slices of the grilled bread with 1 ½ Tablespoons hummus and a few spinach leaves.
Place one veggie patty on the bread and top with the second slice of bread.