Preheat the oven to 350°. Place the baguette slices on a baking sheet. Bake in the oven for 8-10 minutes, until baguette slices begin to brown.
In a medium bowl, add the diced strawberries, diced bell peppers and minced basil. Halve the orange and squeeze the juice over the strawberry salsa. Fold together to blend.
Scoop the flesh out of the avocados and place in a mixing bowl. Using a potato masher, mash the avocado, adding the lemon juice as you mash. Mash until the avocados become spreadable.
When the baguette slices are done crisping, spread a little avocado on each, as though spreading on butter.
Top each crostini with the strawberry salsa mix. Serve immediately.