Ingredients

• 1 medium onion, sliced
• 1 teaspoon olive oil
• 3 tablespoons all-purpose flour
• 2 teaspoons hot mustard, your favourite
• 1/2 teaspoon salt
• 1/4 teaspoon sugar
• 1/4 teaspoon dried oregano
• 4 medium unpeeled new potatoes, thinly sliced, about 4 cups
• 1/8 teaspoon cayenne pepper
• 4 medium tomatoes, sliced 1/4 inch thick
• 1 tablespoon parmesan cheese, grated
• 1 garlic clove, smashed
• 1 cup skim evaporated milk
• 1/2 teaspoon dried sweet basil leaves