Grill the bread: Lightly brush baguette slices with olive oil and grill or toast until golden and crisp. Set aside.
Make the lemony ricotta: In a small bowl, mix the ricotta with lemon zest, lemon juice, salt, and pepper to taste.
Prepare zucchini ribbons: Use a vegetable peeler to shave zucchini into thin ribbons. Sauté in a bit of olive oil over medium heat for 2–3 minutes, just until softened. Season with salt and pepper.
Assemble toasts: Spread a generous layer of lemony ricotta on each toast. Top with warm zucchini ribbons.
Garnish (optional): Finish with a few fresh basil leaves or a sprinkle of thyme. Serve warm or at room temperature—perfect for a relaxed evening or casual gathering.