Here are some vegetables that do amazingly well even in the blazing heat and humidity of the tropical summer in South Florida.
Everglades tomato grows like a bush in South Florida.
Eureka cucumber is not just tolerant but resistant to multiple diseases typically affecting cucumbers in the tropics.
Rover radishes withstand heat and can be grown in the subtropical climate of South Florida:
Malabar Spinach - Jungle perennial vine grown as summer salad green
Moringa Tree. I grew my Moringa trees from these seeds from Amazon:
Chaya Tree Spinach - Perennial Vegetable in Florida
Vegetables for SW Florida in the summer months - ECHO (PDF)