1. Combine sourdough starter, warm water, flour, salt, and olive oil in a bowl and mix until a shaggy dough forms

2. Knead the dough on a lightly floured surface for about 8 minutes until smooth and elastic

3. Place the dough in an oiled bowl, cover, and let rise at room temperature for 3-4 hours until doubled in size

4. Preheat oven to 475°F (245°C) with a pizza stone or baking sheet inside

5. Divide dough if making mini pizzas or keep whole for two large hearts

6. Roll each dough portion into a 10-inch circle and shape into a heart by pinching the bottom into a point and forming two curves at the top

7. Transfer shaped dough to parchment paper or a floured peel and brush edges with olive oil

8. Spread tomato sauce evenly over the heart-shaped base leaving a 1/2-inch border

9. Sprinkle mozzarella cheese and arrange bell peppers, mushrooms, and cherry tomatoes in patterns

10. Slide pizza onto preheated stone or baking sheet and bake for 10-14 minutes until crust is golden and cheese bubbles

11. Remove pizza and let rest for 3-5 minutes

12. Garnish with fresh basil, slice, and serve warm