Preheat the oven to 425°F (220°C). This ensures that your dish will bake evenly and allow the feta to develop a bubbly, golden crust.
Prepare the Baked Feta: In a blender, combine 1 jar roasted red peppers, 1/2 cup walnut halves, 3 Tbsp mild harissa, 2 Tbsp tomato paste, 2 Tbsp extra-virgin olive oil, 2 garlic cloves (minced), and 1/2 tsp kosher salt. Blend until you achieve a smooth consistency. This mixture will be the base for your baked feta.
Assemble in Baking Dish: In an 8"x8" baking dish, spread half of the red pepper mixture on the bottom. Crumble in half of the 6 oz feta cheese over the sauce. Layer the remaining red pepper sauce on top, followed by the remaining feta.
Bake the Feta: Place the baking dish in the preheated oven and bake uncovered for 25 minutes until the feta is bubbly. For an extra touch, broil on HIGH for 2 minutes at the end to achieve a nice golden top.
Prepare the Olive Tapenade: While the feta is baking, prepare the tapenade. In a bowl, mix 1/2 cup green olives, 2 Tbsp finely chopped fresh parsley, 2 Tbsp finely chopped walnuts, 3 Tbsp extra-virgin olive oil, and a pinch of salt until well combined. This tapenade will add a fresh and tangy dimension to your dish.
Serve the Baked Feta: Once the feta is done baking, remove it from the oven and top with the prepared olive tapenade. Serve warm with crusty bread or baked pita. Enjoy the delightful combination of flavors!