Tasty Vegan Guacamole Sandwich

Ingredients (10)

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