Spinach Salad

Ingredients:1 red onion, sliced into 1/4-inch rings2 to 3 slices whole-grain bread, cubed1/2 lb beets (about 2 small beets)4 tbsps extra-virgin olive oil1 small shallot, minced1 tbsp honey mustard1/4 cup red-wine vinegar2 tbsps sugar1/2 tsp coarse salt1/4 tsp freshly ground pepper12 ozs spinach, well washed, stems removed4 ozs button mushrooms, stems trimmed, slicedInstructions:1. Preheat oven…