Preheat your oven to 350°F / 175°C.
Place the baguette slices in a single layer on a baking sheet. 2. Toast for 5 to 10 minutes, or until golden brown and slightly crisp.
Remove from the oven and arrange on a serving platter. 3.
In a medium bowl, combine the diced tomatoes, olive oil, lemon juice, minced garlic, basil, salt, and pepper.
Stir well to combine. 4. Gently fold in the diced avocado, being careful not to mash it. 5. Spoon the tomato and avocado mixture generously onto each toasted baguette slice.
Garnish with fresh lemon zest and serve immediately.
Add the diced avocado at the very last minute before serving to ensure it stays fresh and green.