Preheat oven to 400°F.
Trim and wash beets. Place beets in large baking dish; add 1/4 cup water. Cover tightly with foil. Roast beets 45 minutes or until cooked through. Cool beets until easy to handle.
To prepare dressing, combine vinegar, TABASCO® Green Sauce, garlic and salt in medium bowl. Beat in olive oil gradually until well blended.
Peel and cut beets into 1/2-inch chunks. Toss with red and yellow peppers, and dressing. Arrange spinach on platter; top with beet mixture. Garnish with feta cheese.
Makes 6 servings.