Thai yellow curry with green beans and potatoes

Name: Thai yellow curry with green beans and potatoes
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Cuisine: Asian, Thai
Ingredients: 1 large banana shallot (2 small); 1 whole head of garlic; 2 sticks of lemongrass; 4 cm ginger; 4 bird's eye chillies; 4 makrut lime leaves; 1 teaspoon ground tumeric; 1/2 teaspoon ground cumin; 1 teaspoon ground coriander; 1.5 teaspoon salt; 2 400ml cans of coconut milk; 600 grams waxy potatoes; 2 tablespoons rapeseed oil; 400 grams green beans; Cooked jasmine rice