Ingredients

• ½ ripe avocado, thinly sliced
• ½ ripe tomato, thinly sliced
• 4 thin slices cucumber
• 1 thin slice red onion
• 1 hoagie roll, split lengthwise
• 1 dash lemon juice
• salt and ground black pepper to taste
• 1 leaf Romaine lettuce
• 1 teaspoon vegan mayonnaise (such as Veganaise®)