For partially hyperbolic diffeomorphisms with minimal strong foliations and unstable/stable blender-horseshoes, we establish restricted variational principles for entropy, fixing a specified center Lyapunov exponent and varying the metric entropies among ergodic measures. We prove that for each exponent value in the interior of the spectrum (including value 0), every possible entropy value can be achieved by some ergodic measure. This is joint work with LD Díaz, M Rams, and J Zhang.