It depends what you mean by "minimum".
You could do it using hand made RTL or DTL logic with a couple of transistors.
Or you could do it with a single 7400 chip
#include <stdio.h>
int nand(int a, int b){
return ~(a&b);
}
int main(){
for (int D=0; D<=1; ++D){
for (int P=0; P<=1; ++P){
for (int M=0; M<=1; ++M){
int orig = D & (~P | M);
int t1 = nand(D, nand(P, nand(M,M)));
int test = nand(t1,t1);
printf("%d %d %d: %d %d\n", D, P, M, orig&1, test&1);
}
}
}
return 0;
}