Heart Healthy Valentine Beet Waffles

Ingredients

• 1 1/3 cups skim milk
• 1 cup chopped cooked beets (about 3)
• 2 drops red food coloring (optional)
• 2 large eggs
• 1/4 cup vegetable oil
• 1 tsp vanilla extract
• 1 1/2 cups whole wheat flour
• 1/2 tsp ground cinnamon, plus additional for garnish
• 2 Tbsp sugar
• 2 tsp baking powder
• 1/8 tsp salt
• 1/4 cup low-fat vanilla Greek yogurt
• 2 cups fresh blueberries
• Maple syrup (optional)