chefwide and jenscat have both discussed freezing "sauces" for preservation of flavours esp when some foods can only be found seasonally
here are my recommendations:
*pestos (a puree of an herb usually basil, garlic, pinenuts, parmesan, and pinenuts/walnuts)
*demi glace ( a rich reduction of veal/beef stock, herbs and red wine)
*stocks reductions (something i suggest to all and very easy with a crockpot...make a stock from leftover chicken or beef bones or even fish bones...then strain it and reduce it slowly in the crockpot til very intense and concentrated...better than boullion...i can discuss stocks later)
*garlic puree(add a bit of lemon juice to kill the bacteria)
*ginger puree
*lemongrass puree
*tomato sauce/puree
*avocado puree
*fruit puree
cream or cheese based sauces won't hold
roux based sauces can but too much of a fuss (no good on a keto diet anyway)
i rather freeze intense flavours and then just pop them into a cream reduction or white wine reduction and mont a beurre (finish with butter) to make quick "fresh tasting" sauce
simply saute a bit of shallots/green onion bottoms in a tiny bit of butter do not let brown
add a bit of white wine
a few ounces of cream
let reduce by half
add your flavour concentrate
add salt and pepper and instant sauce
if not wanting cream, then substitute the stock reduction, bring up to a boil and swirl in a knob of butter (optional) and your flavour concentrate
this is a technique used in french restaurant for years but almost a lost art (salpicon)
sauces are a forte of mine so i rather make em fresh
1 small shallot, minced (can substitute green onion bottoms or sweet onion
1 ounce dry white wine
a few drops lemon juice or xeres/sherry vinegar or rice vinegar or white wine vinegar
4 ounces cream
flavouring agent (see above post)
sweat the shallots in the butter (do not brown)
add white wine and reduce to a trace (do not brown)
add cream and reduce by half
add flavouring agent
salt and pepper
a quick cream sauce that taste great and fresh and good enough to impress a date
my dinner last night
i had a fab date with a great gal
and this is what i made her
and it's a definite pantyremover
1 pound baby spinach ( or regular spinach....i hate cleaning spinach)
4 tablespoon olive oil
8 cloves of garlic minced ( you're both eating it so what)
sea salt to taste
copious amounts of freshly ground black pepper
pinch nutmeg
8 ounces shrimp, peeled deveined and split in two
2 ounces sambuca or pernod
1 cup swiss cheese
saute spinach and garlic in olive oil
season with salt pepper and nutmeg
add shrimp toss til opague
flambee with sambuca
put in two bakeproof dishes and top with swiss cheese
place under broiler til cheese is melted and not quite brown
serve and observe her trying to eat it while the cheese strings along and she licks it away
definitely alot of eating went on last night and not just spinach and cheese