The following will plot quadrilaterals from your grid (if you prefer triangles you can use the patch command)
x = 0 : 0.1 : 1;
y = 1 : 0.2 : 2;
[X, Y] = meshgrid(x, y)
h = mesh(X,Y,ones(size(X)));
set(h,'marker','o','markeredgecolor','k','markerfacecolor','r', ...
'facecolor',[.9 .9 .9])
grid off
view(0,90)
axis equal