Preheat the oven to 400 °F (200 °C). Slice the red bell peppers, toss with olive oil, salt, and pepper, then spread them on a baking sheet. Roast for about 20 minutes until softened and slightly charred.

Allow the roasted peppers to cool slightly, then blend them with garlic and lemon juice until smooth to create a luscious sauce.

Meanwhile, heat a lightly oiled skillet over medium heat and cook the tilapia fillets for about 3–4 minutes on each side, until golden brown and flaky.

Pour the vibrant roasted pepper sauce over the cooked fish and let it simmer together briefly—about 1–2 minutes—to meld the flavors.