Place the baguette slices on a baking sheet and bake until the oven until lightly toasted, about 5 minutes. Transfer to a serving dish.
Increase the oven heat to 400 degrees F. Line the baking sheet with foil.
In a medium bowl, toss with tomatoes with olive, ⅛ teaspoon salt and ⅛ teaspoon pepper. Transfer to the prepared baking sheet.
Roast for 10 minutes. Lightly toss the tomatoes with the garlic. Roast until the tomatoes are tender, 8 to 10 additional minutes.
In a small bowl, mash the avocado with the back of a fork until smooth. Stir in the lemon juice, ⅛ teaspoon salt and ⅛ teaspoon ground pepper.
Spread the avocado mixture onto the baguette slices. Top each crostini with 3 roasted tomatoes and some basil. Serve.
Notes
Please note that I am not a medical or nutritional professional. I provide nutritional information for my recipes as a courtesy to my readers. It is calculated using the LoseIt! calculator. While I attempt to provide information that is as accurate as possible, you should calculate the nutritional information independently before relying on it.