Cassava and Curry Beef meal (Mihogo na Nyama )

Ingredients 
1 1/2 pounds cassavas (about 3 by 8 inches long ), peeled and cut into 2-inch cubes 
1 pound beef stew 
1 3/4 pounds broccoli cuts into small florets
1 diced tomatoes
2 cloves garlic, minced 
1 teaspoon chopped fresh ginger 
1 teaspoon curry 
1 diced onion 
Coconut milk (option) 
Olive oil 

5 cups water or enough to cook beef
Salt and black pepper to taste 

Directions 
Heat the olive oil in a skillet over medium heat, and brown the beef. 
Remove from skillet, reserving juices, and season with salt and pepper. 
Cook and stir the garlic, ginger in the skillet for 2 minutes, until tender, and season with curry powder. 
Mix in the diced tomatoes and juice.
Place back the beef and cook for 30 minutes 
Add the cassavas, broccoli and onion cover and cook until cassavas is done 
about 1 hour
Add coconut milk (option) - cook, stirring often, for 5 minutes 
Serve while hot