Sweet Potato and Avocado Sandwiches with Poppy Seed Spread

INGREDIENTS

• 1 sweet potato, peeled and cut into 1/2-inch-thick slices
• 2 tablespoons olive oil
• 1 tablespoon honey
• For Spread:
• 1 tablespoon honey mustard (or 2 teaspoons dijon mustard plus 2 teaspoons honey)
• 2 tablespoons mayonnaise
• 1 teaspoon red wine vinegar
• 1/4 tsp poppy seeds
• To Assemble:
• 4 slices whole wheat bread
• 4 red onion slices, cut 1/8-inch thick (optional)
• 1/2 avocado cut into 1/4-inch-thick slices
• 4 tomato slices, cut 1/4-inch thick
• 1/2 cup baby lettuce or herb salad mix