Preheat oven to 350F.
Cook the egg noodles according to package al dente directions.
In a medium-sized saucepan, melt 1 Tablespoon of the butter over medium heat.
Add the onion and celery to the butter and cook until onion is translucent, about 3 minutes. Add the garlic and continue cooking for 1 minute until fragrant.
Remove vegetables to a small dish.
In the same pan, melt 1 tablespoon of butter over medium heat. Add the crushed Ritz crackers and cook for two minutes. Remove and set aside.
Place 2 Tablespoons of butter in the same saucepan and melt. Stir in the all-purpose flour until you form a brown roux.
Whisk the milk into the roux, and then add the broth and spices. Increase heat to medium-high until boiling. Reduce heat to medium-low and simmer for two minutes, then remove from heat.
Place the cooked egg noodles in a casserole dish, then stir in the vegetables (including the corn), tuna and dill sauce (will still be quite thin).
Top with shredded cheese and then the Ritz crackers.
Bake for 35-30 minutes, until the sauce is set and the cheese is completely melted.