This day turned into a lucky one since my unplanned (and on the spot) white sauce spaghetti for dinner turned out great. To think that was just a last minute inspiration of here and there ingredients.
Baked tuna spaghetti was the only pasta on the menu but I overestimated the noodles. Thinking of just putting it in the fridge for soup, I suddenly remembered a cream of corn soup mix in the pantry. I just added evaporated milk, chopped garlic, some spices (I can get hold of) and parmesan cheese. It looks very plain but its very tasty (and saucy. I overestimated the white sauce this time but that's the secret).
This discovery opened a lot of possibilities. Maybe chicken or crabsticks next time.