Prep the Salsa: In a glass bowl, combine the mango, red onion, tomatoes, bell pepper, and cilantro. Add the juice of 1.5 green lemons and a splash of olive oil. Season with salt, pepper, and red pepper flakes. Set aside in the fridge to let the flavors marry.
The Crunch: Shred the radicchio very finely. Rinse with cold water and pat completely dry with a paper towel. This keeps the taco from getting soggy.
Grill the Protein: Pat the shrimp dry. Toss them with olive oil, garlic, salt, and pepper. Heat a griddle or cast-iron pan to medium-high. Grill the shrimp for 2 minutes per side until they are opaque and have a slight char.
Toast the Tortillas: Warm your corn tortillas on a dry pan until they are flexible and have toasted spots.
Assembly: Layer the shredded radicchio first, followed by 3–4 grilled shrimps, and top generously with the mango salsa.
Finish with a final squeeze of green lemon and a few whole cilantro leaves. Serve on your terracotta-and-sage green ceramic plate for a beautiful, vibrant presentation.