Add split peas and 2 1/2 cups (625 mL) water to a medium saucepan, bring to a gentle boil, reduce heat, cover and simmer for 45 minutes. Cool slightly and do not drain. In small batches, mash or purée cooked peas with a food processor, blender or potato masher until the consistency of canned pumpkin. Add more water 1 Tbsp (15 mL) at a time to reach desired consistency. Set aside. Makes 2 cups split pea puree.
Bread
Preheat oven to 350°F (180°C). Generously grease two 5x9-inch (13x23 cm) loaf pans. Set aside.
Cream together butter and sugar. Beat in eggs, one at a time. Add split pea purée and 2/3 cup (150 mL) water.
In a separate bowl, sift together dry ingredients, except nuts. Stir into creamed mixture along with chopped nuts.
Divide between prepared loaf pans and bake for 60-70 minutes. The bread is done when a toothpick inserted into the center of loaf comes out clean. Cool loaves in pans for 5 minutes, then remove to wire racks to cook completely. Store in airtight containers.