Vegetarian Shepherd's Pie - Diabetes Self-Management

Ingredients

• 2 teaspoons olive oil
• 1 cup sliced onion
• 1 package (16 ounces) mushrooms, quartered
• 1 1/4 teaspoons minced garlic, divided
• 1 cup sliced carrots
• 1 cup sliced celery
• 1 cup frozen green peas
• 1/4 cup all-purpose flour
• 3 cups low-sodium vegetable broth
• 1/4 teaspoon salt
• 1/4 teaspoon dried rosemary
• 2 medium russet potatoes, peeled and cubed
• 1/4 cup fat-free (skim) milk
• 1 tablespoon light margarine
• 1/4 teaspoon black pepper
• Fresh rosemary (optional)