Preheat the oven to 375°F. Arrange baguette slices on a baking sheet and brush lightly with olive oil.
Toast the bread for about 7–8 minutes until crisp and golden around the edges.
Mash the avocado with lemon juice, a pinch of salt, and black pepper until smooth and creamy.
Heat butter in a skillet over medium heat. Add garlic and sauté until fragrant, about 30 seconds.
Add shrimp to the skillet. Cook for 2–3 minutes per side, until pink and cooked through. Season lightly with salt and pepper.
Spread mashed avocado onto each toasted baguette slice.
Top each with one shrimp and a sprinkle of fresh herbs. Serve warm and watch them vanish.