Heat oven to 350°F. Grease a 12-cup mini muffin pan with 1 tsp olive oil.
Warm 1 tbsp olive oil in a skillet over medium heat.
Sauté bell pepper and scallions until softened, 3 to 4 minutes.
Stir in spinach and cook just to wilt. Remove from heat to cool slightly.
Blend tofu, almond milk, nutritional yeast, cornstarch, baking powder, lemon juice, and spices until smooth.
Fold the cooled vegetables and chopped pistachios into the tofu mixture.
Spoon batter into the pan, filling cups nearly to the top. Smooth the tops.
Bake 20 to 22 minutes, until set and lightly golden. Cool 5 minutes, then lift out and serve.