INGREDIENTS
1 lb
penne rigate
2
large leeks
4 oz
spinach
1/2
small onion
1
garlic clove
3 oz
butter
4 tbsp
all-purpose flour (slightly heaping)
1/4
to 1/2 tsp white pepper
1/2 tsp
mustard powder
1/4 tsp
nutmeg
5 oz
sharp cheddar
2 oz
Gouda cheese (or another cheese of choice)
2/3 tsp
salt
2
+ 1/4 cups milk
3 oz
walnuts