Bring milk, cream, and salt to a boil.
Turn off heat and stir in vinegar. Let sit for one minute. Mixture will separate.
Line a screen strainer with cheesecloth and place over large bowl. Pour mixture into strainer and strain the liquids into the bowl.
Chill and continue to drain liquid into the bowl overnight. The contents of the strainer will be quite firm the next day.
Discard the liquid from the bowl.
Place the firm ricotta into a food processor. Add peach slices, sugar, vanilla, and four eggs. Blend until smooth