Heat a large skillet over medium heat.
Add the red curry paste and sauté for 1-2 minutes until fragrant.
Pour in the coconut milk and stir well to combine.
Add the cubed chicken, beef, or tofu to the skillet.
Cook for 5-7 minutes until the protein is cooked through.
Add the sliced bell peppers and zucchini to the skillet.
Stir in the bamboo shoots, fish sauce, and sugar.
Simmer for another 5-10 minutes until the vegetables are tender.
Taste and adjust seasoning if necessary.
Serve hot over jasmine rice, garnished with fresh basil leaves.