In a high-speed blender, combine the diced mangoes, plain yogurt, coconut milk, honey, ground cardamom, lime juice, and a pinch of salt.
Blend everything on high until the mixture is completely smooth and creamy, ensuring that there are no chunks of mango left for a velvety texture.
Taste the creamy mango mixture and add more honey or agave syrup if you prefer it sweeter. If you add anything, blend again briefly to combine well.
Carefully pour the luscious mango lassi mixture into popsicle molds, making sure to leave a small gap at the top of each mold to allow for expansion during freezing.
Place popsicle sticks into the molds, ensuring they stand upright, then carefully transfer the molds into the freezer.
Allow the pops to freeze for a minimum of 6 hours or until they are completely solid.
To remove the popsicles, run warm water over the outside of the molds for a few seconds to loosen them, then gently pull them out.
Present the popsicles immediately, garnishing each with a sprig of fresh mint leaves for an added burst of color and a refreshing aroma.