To make the pesto:
Pulse together the peas, basil, lemon zest, lemon juice, olive oil, and salt, until well combined.
To make the pizza:
Preheat the oven to 400 degrees F.
Spread out pizza dough on a well floured surface.
Spread the pea pesto over the dough, leaving a 1/2" crust.
Sprinkle with peas, then top with shredded cheese.
Place pizza on a floured pizza stone or onto parchment paper-lined baking sheet.
Bake in preheated oven for 12-15 minutes, until cheese is melted and crust is golden brown.
Slice, top with sliced radishes and lemon zest, and enjoy!