Camelini bean mash

Name: Camelini bean mash
Cuisine: Cuban, Latin American
Ingredients: 120ml extra virgin olive oil; 4 cloves of garlic, roughly chopped into chunks; 2 small sprigs of rosemary; 800g canned cannellini beans in water, drained but not rinsed; zest of ¼ unwaxed lemon and about 1teaspoon of lemon juice, to taste sea salt and freshly ground black pepper