Add lemon juice in the luke warm milk. ( I have warmed the milk for 40 sec in the microwave). Keep it aside for 5 minutes.
In the meanwhile sift the whole wheat flour, powdered oats, baking powder, baking soda and salt for 3 times.
In a big mixing bowl add oil, milk powder and sugar. Mix well till sugar is dissolved well.
Add dessiccated coconut and mix well.
Add vanilla essence and mix well.
The milk is curdled well.
Add the curdled milk and mix well.
Mix well .
Add the sifted flour gradually and mix gently.
Fold in the pineapple pieces.
Mix gently. The battter is ready.
Pour the batter in the greased and dusted square cake tin pan of 8 x 8 inch. Bake in temohe preaheated oven at 180 C for 45 to 50 minutes or till the toothpick comes out clean when inserted.
Remove the cake tin and unmould the cake and let it cool on a wire rack.
The healthy eggless pineapple coconut cake is ready.
Cut it into pieces and serve it warm with hot tea or coffee or refrigerate and store in airtight container for a week. The cake can be freezed for a month.