“Are we talking abt halacha or kabala
But don�t say that its ageinst halacha”
Again, you’re using the exact same line of defense as the other guy. The topic is not whether or not you can be yotzei without bread. The topic is that you have a minhag to actively avoid bread. And, yes, it is halachically more l’hatchillah to use bread. You took the b’dieved and made it l’hatchillah and took the l’hatchillah and made it assur (for no reason). Should any rabbi be able to go and do that to the mesora?
“Achilas kava ? Where�d you see or hear of such a thing.”
Are you asking me what it means or when I’ve seen Lubavitchers do it? If the latter, are you really going to tell me you’ve never seen Lubavitchers eat a shiur of mezonos before shachris? I’ve even heard of them doing bagels, although I admit I’ve never seen that personally.