Crab Salad Tostadas

Name: Crab Salad Tostadas
Ingredients: 4 celery stalks, thinly sliced; 1 pint cherry tomatoes, preferably yellow, halved; 1 cup mint leaves; 1 jalapeño, seeded if desired, thinly sliced; 2 Tbsp. fresh lime juice; 1 Tbsp. extra-virgin olive oil; 2 tsp. Old Bay seasoning; 1 tsp. kosher salt; ½ lb. super lump or jumbo lump crab meat, picked over, drained; 1 batch Creamy Avocado Dip; Lime wedges (for serving)