
Thought it would be obvious to most folk on here. Sorry.
Take any plain cheesecake recipe you're happy with (personally I use a mascarpone and digestives combo, but as you like) and use a bit less butter in the base than you normally would and add:
Strawberry:
Chopped strawberries (about 5) and some glaze.....
......Use jelly glaze packet or jelly cubes and dilute in minimal boiling water possible then add syrup from strawberries. puree in 1/3 available strawberries. When cool, use about 1/4 of glaze to colour/bind base, and keep the rest to top off cheesecake.
Mix the cheese filling, and for the strawberry one, put half on, then top with half remaining strawberries. Fold in remaining strawberries bar 3 (chopped), into rest of filling and carefully place on top. Put in fridge for firming before topping with 3 kept back strawberries and remaining glaze. If you pour the glaze slowly over the three strawberries, it doesn't break the surface of the cheese filling.
Lemon & Lime:
Juice of half each lemon & lime added to base.
Add grated zest of half lemon and lime to cheese filling, saving a pinch or three for decorating. Sprinkle remainder on top and twist one half-slice of lime in centre.
Only feedback I got that I'm unclear if positive, is that lemon and lime one was very rich.
It also isn't at all sweet (which is the intention).
Sorry the quantities are vague, but I didn't measure anything. Just add more biscuits if base too wet, more juice/glaze if too dry. Cheese filling isn't affected by additions, and glaze just puree and syrup substituting water.