Potato, Brocooli, Cheddar Soup

I'm not feeling well this week so I wanted to make soup in my slow cooker last night. My plan was to put it in right when I got home so I wouldn't have to mess with anything later when Blake came over to eat. I tried to cut a recipe in half, but I had to add more water to get the right consistency so now I have soup which I have to eat the rest of the week. I couldn't really taste the soup that well but I think it was kind of bland. It was probably because the recipe didn't have any cream in it.

Ingredients:
4 potatoes, peeled and cut into small chunks
1 bunch of spring onions, whites only, chopped - reserve greens for garnish
3 cloves of garlic, minced
1 can vegetable stock
1 can evaporated fat free milk
about 2 cups of water
1 package cut broccoli florets
salt, pepper
1 cup shredded cheddar cheese

Directions:
Add everything into the slow cooker except water, broccoli and cheddar. Cook on high for 4 hours or low for longer. Mash potatoes with a potato masher. Add water if necessary to thin out the soup. Stir in the broccoli and cheese. Heat through and serve immediately with crusty bread. Garnish with green onion.