Step 1Drain liquid from tofu. Place on tray lined with paper towels. Cover with paper towels and pat tofu to absorb moisture. When towels become soaked, replace with new towels. Let tofu stand and drain about 1 hour. Cut tofu into 1/2-inch cubes and place in shallow dish.
Step 2Whisk together garlic, mustard, vinegar, lemon juice, oil, sugar, salt and pepper to taste in small bowl. Pour over tofu; let stand 30 minutes, stirring occasionally.
Step 3Arrange green beans and beets on 4 plates lined with spinach leaves. Spoon marinated tofu over of vegetables.