Pour your milk into a large stockpot and place it over medium high heat. Slowly heat it to 190-195°F, stirring occasionally to prevent the bottom from scorching. A kitchen thermometer is helpful here, but you can also gauge it when the milk starts to steam without boiling.
Take off the pot from the heat and then gently stir in the vinegar for a minute or so. Watch as the milk begins to separate into curds and whey. Let it sit for 5-10 minutes to allow the curds to form fully.
Carefully pour the curds into a cheesecloth-lined colander or mesh strainer and set it over a large bowl to catch the whey. Allow the whey to drain for about 15-30 minutes or longer if you prefer a firmer/drier ricotta.
Sprinkle in the salt and give the ricotta a gentle stir to incorporate. Transfer your fresh ricotta to a container, cover it, and store it in the refrigerator for up to a week. If you’ve made more than you can use, you can freeze it for later use.