beet salad recipe

4 medium beets, roasted and peeled - 1/4 cup walnuts, toasted - 2 cups mixed greens (such as arugula, spinach, and lettuce) - 1/4 cup crumbled goat cheese (or feta cheese) - 1/4 cup red onion, thinly sliced - 2 tablespoons balsamic vinegar - 2 tablespoons olive oil - 1 tablespoon honey - Salt and pepper to taste