Pea and Ham Soup - Cooking like a Boss

Ham can be substituted for pre-boiled gammon. Very large portions for two but very morish.

5 tbsp 0.075 l 75 ml 15 tsp 0.317 cup 0.132 pint butter	heat on low-medium	stir in until coated in butter	cover and sweat 10mins	boil until peas float to surface	blend until smooth	add ham	bring to simmer	season
5 medium onion	finely chopped
5 large potato	peeled and cut into small cubes
salt
pepper
1500g 1 ¹⁄₂kg 3.31lb 52.9oz frozen peas
2000ml 2l 133 ¹⁄₃tbsp 400tsp 8.45cup 3.52pint chicken stock
500g ¹⁄₂kg 1.1lb 17.6oz thick cut ham