Zest & juice the lemon, set aside two tablespoons of the juice for dressing. Add ricotta with a pinch of black pepper & salt. Smear 1/4 cup ricotta mix on each slice of bread. Top with an even layer of asparagus, season with salt & pepper and bake for 15 minutes.
Meanwhile, make the topping. Cut the peas into ½” pieces, place in a bowl with the parsley. Shave the radish into this mix. Place the reserved lemon juice into a bowl. Whisk in the olive oil & honey and some salt and pepper. Pour this over the pea mixture to dress it, toss to combine.
Once the tartine is baked, top each piece generously with the salad & enjoy!