European Kitchen - Grilled cauliflower with pistachio pesto

Recipe ingredients:

1 large flower head, preferably mine

2 tablespoons olive oil

2 onions, cut into slices

Salt and black pepper

Pistachio pesto:

Zest of lemon

½ cup of coriander and parsley leaves

¼ cup olive oil

¼  cup of raw pistachios

1 clove of garlic

¼ teaspoon salt

A pinch of black pepper