Have you even looked at the prepper threads?
I'd recommend searching out bellinisurge's posts on the topic good, practical non scaremongering advice.
But basically as you say, enough to see you both through 2 weeks without needing to shop.
Fresh is nice but really you need to be thinking non perishables or frozen or at a push long lasting perishables
Non perishables:
Pasta/rice/noodles/cous cous depending on your preference. Plain cheaper than flavoured versions of course
Bread & biscuits - keep a loaf in freezer if you can it's absolutely fine toasted.
Passata (bass for many sauces comes in cartons and lasts ages unopened)
Long life milk (doesn't need to be refrigerated but I think it tastes better chilled)
Tins - for "on toast", soups, "meal in a can" (things like Bolognese, ravioli, chilli, curry), tinned veg (carrots, peas, corn etc), tinned fruit, custard, pulses and lentils which can be used instead of mince, meat (corned beef, spam, hot dogs, meatballs), fish (tuna, pilchards)
Sundries that make life easier/food more palatable - oil for cooking, herbs & spices, condiments, soy sauce, mustard, marmite you get the idea
Pot snacks keep for ages too - pot noodle, pot pasta etc and are easy to make if you don't feel like cooking.
Dried fruit - bit of a sweet treat that keeps well and also nutritious
Freezer:
Bread/wraps
Veg
Meat & fish - the more versatile the better I'd say
Long lasting perishables:
Eggs
Processed cheese
Fruit juice
Smoothies
Yogurts
Root veg
Certain fruit - apples, pears, oranges all last at least 10 days if stored well.
Bananas and grapes freeze well.
Hope that helps to get you started
I know you only asked about food but don't forget also
1st aid supplies/basic medicines
Toiletries