Honestly, why not just peg the value of 100 of a a currency to the energy used to create a loaf of bread? Then bread will always cost close to 100 and other products will be priced according to energy and not speculation. The recipe would need to be standardized and compared but not automatically equivocated to supermarket/bakery/homemade bread, and changing it once the hypothetical currency is live would not be an option, but you’re asking to replace the entire capitalist economy so I can only hope you understand a revolution doesn’t come without risk and has never truly succeeded yet for anyone ever.